When the temperature drops, keep baby's sleep perfectly warm with our premium winter sleep bags. Designed specifically for cooler environments, these warm sleep sacks combine plush insulation with the breathable comfort of bamboo rayon—creating the ideal microclimate for deeper, longer winter sleep.

The generous cut allows for natural movement and healthy hip development, while still fitting snugly at the arms and neck to prevent cold drafts. Our innovative WONDERZiP® means those inevitable midnight diaper changes happen quickly, without fully exposing baby to chilly air or disrupting their cozy sleep environment. It's thoughtful winter comfort, wrapped in the silkiest package.

Why choose the gunamuna winter sleep bags?

• Perfect Temperature Balance: Our carefully calibrated 2.5 TOG rating is specially designed for typical winter home temperatures (65-68°F)—no more guessing if baby is too hot or too cold.
• Midnight Change Magic: Our exclusive WONDERZiP® design means diaper changes happen without unwrapping baby completely—keeping their upper body warm while you take care of business.
• Safer Winter Sleep: Eliminates the need for loose blankets or layers that can pose suffocation risks while ensuring even, consistent warmth throughout the night.
• Room to Move, Space to Grow: The generous lower portion provides plenty of kick room and supports healthy hip development, while the snug upper prevents drafts—the perfect winter sleep solution.